/Engine/Source/Runtime/MovieScene/Public/Channels/MovieSceneChannelProxy.h
Get the channel for the specified index of a particular type.
A pointer to the channel, or nullptr if the index was invalid, or the type was not present
[FMovieSceneChannel](API\Runtime\MovieScene\Channels\FMovieSceneChannel) * GetChannel ( [FName](API\Runtime\Core\UObject\FName) ChannelTypeName, int32 ChannelIndex ) const